学步园

public partial class glassku_Default : System.Web.UI.Page<br /> {<br /> protected void Page_Load(object sender, EventArgs e)<br /> {<br /> if (!IsPostBack)//如果是页面首次加载，则执行Add语句；再点击Button1_Click事件，执行二次加载，就不再执行Add语句了。<br /> {<br /> DropDownList1.Items.Add("北京");<br /> DropDownList1.Items.Add("上海");<br /> DropDownList1.Items.Add("杭州");<br /> DropDownList1.Items.Add("成都");<br /> DropDownList1.Items.Add("重庆");<br /> //建立单值Cookies<br /> //法一：<br /> HttpCookie mycookie1 = new HttpCookie("c1");<br /> mycookie1.Value = "zhang";<br /> mycookie1.Expires = DateTime.Now.AddDays(1);<br /> Response.Cookies.Add(mycookie1);</p> <p> //法二：<br /> HttpCookie mycookie2 = new HttpCookie("c2", "zhangyj");<br /> mycookie2.Expires = DateTime.Now.AddDays(1);<br /> Response.Cookies.Add(mycookie2);</p> <p> // 法三：<br /> Response.Cookies["username"].Value = Server.UrlEncode("张亚京");<br /> Response.Cookies["username"].Expires = DateTime.Now.AddDays(1);</p> <p> //建立多个Cookies<br /> //法一：<br /> HttpCookie mycookie3 = new HttpCookie("a");<br /> mycookie3.Values["a1"] = "zhang";<br /> mycookie3.Values["a2"] = "yj";<br /> mycookie3.Expires = DateTime.Now.AddDays(1);<br /> Response.Cookies.Add(mycookie3);</p> <p> // 法二：<br /> Response.Cookies["b"]["b1"] = "zhang";<br /> Response.Cookies["b"]["b2"] = "yajing";<br /> Response.Cookies["b"].Expires = DateTime.Now.AddDays(1);</p> <p> }<br /> }<br /> protected void Button1_Click(object sender, EventArgs e)<br /> {<br /> Label1.Text = Request.Cookies["c1"].Value + "<br>"<br /> + Request.Cookies["c2"].Value + "<br>"<br /> + Server.UrlDecode(Request.Cookies["username"].Value) + "<br>"<br /> + Request.Cookies["a"].Value + "<br>"<br /> + Request.Cookies["b"].Value + "<br>"<br /> + "选择的城市是：" + DropDownList1.SelectedValue.ToString();<br /> }</p> <p>}

页面输出结果如下：